Photochromoscopic apparatus.



No. 668,989. Patented Feb. 26, |90I.

F. E. IVES. PHUTOCHBOIUSCUPIC APPARATUS.

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Patented Feb. 26, I90I.

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UNITED STATES PATENT GEEICE.

FREDERIC EUGENE IVES, OF PHILADELPHIA, PENNSYLVANIA.

PHOTOCHROMOSCOPIC APPARATUS.

SPECIFICATION forming part of Letters Patent No. 668,989, dated February 26, 1901.

Appneetiee inea December 11, 1ste. serai Ne. 739,959. die meer.)

silvered on the side, which constitutes the hypotenuse of the triangle. The second set of reflectors is disposed in a line which is diagonal in respect to' the line of the primary reflectors 2, 3, aud 4, and the angle of said Beit known that I, FREDERIC EUGENE IvEs, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Photochromoscopic Apparatus, of which the following is a specisecondary reiiectors 2 3LL 4 is such in respect cation. to the angle of the primary reliectors 2, 3, The object of my invention is to provide a and 4, and the axial rays received by said simple form of instrument capable for use secondary reflectors will be reflected in aline 1o either asacamerafor producing color-records diagonal to that of the primary reflectors, of objects or as aphotochromoscope for viewbut in the same plane, whereby said secing chromograms made from such color-rec ond reflected rays will be received by a senords. sitive plate or plates disposed in the saine When used as a camera, theinstrument plane as the primary reflectors 2, 3, and 4, produces at a single exposure from a single but oppositely diagonal to the line ot said point of view and upon a single sensitive reliectors. In the present instance the plateplate or upon a series of such plates dis holder 5 is at an angle of forty-live degrees posed side by side in the same plane a set in respect to the axial ray er', the secondary of three images which are identical in size reflectors 2, 3, and 4 being at an angle of 2o and perspective, but which contain diersixty-seven and one-half degrees ian respect ences in gradations of shade,which constitute to said axial rays. a color-record for use in the processes of com- There may be 'a single lens at the opening posite color-photography. x of the camera, as shown at 20, Fig. 3; but When used as a photochromoscope, the in- I prefer to employ a series of three lenses 6, z 5 strument provides a means for optically blendone for each reflected image, said lenses being ing three images in perfect register in order located between the sensitive plate and the to form to the eye a reproduction in colors of secondary reflectors 22, 3a, and 4w These the image viewed. lenses may be mounted in a frame 7, which In the accompanying drawings, Figure 'l is has racks 8, engaging with pinions 9 on a 3o a sectional View of a camera constructed in transverse shaft 10, having a suitable knob accordance with my invention. Fig. 2 is a or handle'll on the exterior of the camera View of an eyepiece which maybe employed box, so that the lenses may be readily adwhen the instrument is used asa photochrojusted for focusing purposes. inoscope. Fig. 3 is asection of part ofthe in- The three color-screens l2 may be disposed strument,illustrating a modification of the at any point in the path of' the rays after the invention; and Fig. 4 is a transverse section latterhave been divided by the primary redecof the instrument shown in Fig. l, illustrattors 2, 3, and 4, the preferable pian being to ing the latter as binocular or stereoscopic. mount these color-screens in a frame which The casingl of theinstrument has an opencan be inserted in front of the plate-holder 5. 4o ing at 0c, so that the axial ray from the object This arrangement permits of having a differtakes the course indicated by the line fr. In ent set of screens for taking and viewing, the the path of this axial ray are interposed three screens being mounted in interchangeable reiiectors 2, 3, and 4, the reectors 2 and 3 frames. n being transparent, so that they will reflect Instead of the axial ray from the object enportions of the rays mpinging upon them tering the camera in the direction of the line and transmit the remaining portions of the 9c' it may enter the same in a direction at right rays, whereby an image will be reflect-ed from angles thereto-that is to say, in the direction each of said reflectors 2, 3, and 4 in a direcof the arrow e-the optical result being the tion at right angles to the line of the axial same, except that the image is reversed. 5o ray oc. These reflected rays are caught and When the instrument is used as a photochromoscope, a chromogram takes the place of the sensitive plate and the direction of the of that which I again reflected by a second series ot reflectors 2, 3a, and 4, these second reflectors consisting by preference of rectangular prisms rays of light is the reverse IOO have just described, the point or y becoming the viewing-point, and in such case an yepiece ofthe character shown in Fig. 2 may e used, said eyepiece consisting of a casing la, havinga pair of convex lenses l5 and I6.

In an application for patent filed by me on the 7th dayof October, 1899, Serial No. 732,915, I have described a camera having a set of primary reflectors inclined one behind another in the same line, two of these reflectors being transparent and the set of reflectors being used in combination with a set of secondary reflectors disposed diagonally to the first set; but said secondary reflectors were arranged to reflect the images onto a sensitive plate or plates disposed in a different plane from the primary reflectors, and this necessitated the use of a camera-box comparatively large in size and awkward in shape. These objections are overcome in my present instrument, in which the sensitive plate occupies the same plane as the reflect-ors, and, furthermore, a camera constructed in accordance with my present invention can readily be made stereoscopic by duplicating the lenses 6 and lengthening or duplicating' the reflectors, colorscreens, and sensitive plate or plates, as shown, for instance, in Eig. el.

A diaphragm-plate I7 is preferably interposed between the primary and secondary reflectors, this diaphragm-plate having an aperture foreach of the reflected images, and partitions 1S are employed for preventing` the overlapping of the images.

Having thus described my invention, I claim and desire to secure by Letters Patent` l. In photochromoscopic apparatus, the combination of' a casing, means for projecting an image, a series of inclined primary reflectors disposed one behind another in the same line, two of said reflectors being transparent, and a series of secondary reflectors disposed one behind another in a line which is diagonal to that of the primary reflectors, each secondary reflector being inclined at an angle different from that of its corresponding primary reflector and in the same plane.

2. In photochromoscopic apparatus, the combination, of a casing, means for projecting an image, a series of inclined primary re` flectors disposed one behind another in the same line, two of said reflectors being transparent, and a series of secondary reflectors disposed one behind another in a line diagonal to that of the primary reflectors, said secondary reflectors being so inclined that the reected axial light-rays proceed therefrom in lines diagonal to the primary optic axis bnt in the same plane.

3. In photochromoscopic apparatus, the combination of a casing, means for projecting an image, a series of inclined primary reflectors disposed one behind another in the same line, two of said. reflectors being transparent, and a series of secondary reflectors arranged one behind another in a line which is diagonal to that of the primary reflectors, said secondary reflectors being so inclined that the reflected light-rays proceed in a direction diagonal to the line ofthe primary reflectors and perpendicular to a plane which is oppositely diagonal to said line.

4:. In photochromoscopic apparatus, the combination of a casing, means for projecting an image, a series of inclined primary reflectors disposed one behind another in the same line, two of said reflectors being transparent, a series of secondary reflectors arranged one behind another in a line which is diagonal to that of' the primary reflectors, each of said secondary reflectors being inclined at an angle different from that of its corresponding primary reflector, and an apertnred diaphragm disposed between each primary reflector and its corresponding secondary reflector.

5. In photochromoscopic apparatus, the combination of a casing, a series of inclined primary reflectors disposed one behind another in the same line, two of said reflectors being transparent, a series of secondary reflectors arranged one behind another in a line which is diagonal to that of the primary reflectors, each of said secondary reflectors being inclined at an angle different from that of the corresponding primary reflector but in the same plane, and a series of lenses disposed in the path of' the rays reflected by said secondary reflectors.

6. In photochr-tV .oscopic apparatus, the combination of a casing, a series of inclined primary reflectors disposed one behind another in the same lze, two of said reflectors being` transparent, a series of secondary reflectors arranged one behind another in a line which is diagonal to that of the primary reflectors, each of said secondary reflectors being inclined at an angle different from that of the corresponding primary reflector but in the same plane, and a series of lenses disposed in the path of the rays reflected by said secondary reflectors and adjustable from and toward said reflectors.

7. In photochromoscopic apparatus, the combination of' a casing, means for projecting an image, a series of color-screens, a series of inclined reflectors disposed one behind anoiher in the same line, two of said reflectors being transparent, and a second series of reflectors disposed one behind another in a line which is diagonal to that of the first series, said second series of reflectors being so inclined that the reflected axial light-rays proceed therefrom in lines d1agonal to the primary optic axis but in the same plane.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FREDERIC EUGENE IVES.

lVitnesses:

F. E. BECHTOLD, J os. I-I. KLEIN.

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